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GRSE Delivers 'Arnala', India’s First Anti-Submarine Warfare Shallow Water Craft (ASW SWC), to Indian Navy.

Science and Technology | Dated: 13 May 2025

In May 2025, Kolkata-based Defence PSU Garden Reach Shipbuilders and Engineers Limited (GRSE) delivered the first indigenously developed Anti-Submarine Warfare Shallow Water Craft (ASW SWC), named ‘INS Arnala’, to the Indian Navy (IN) at the L&T Shipyard in Kattupalli, Tamil Nadu. This vessel is the first of eight ASW SWCs being built for the Navy under the 'Atmanirbhar Bharat' initiative.

🎯 Key Highlights:

  • - INS Arnala is named after the island of Arnala, located off Vasai, Maharashtra, known for its historic fort. The name reflects India’s maritime heritage and strategic coastal significance.
  • - The vessel features nearly 88% indigenous content, showcasing a significant step toward self-reliance in defence manufacturing. It underscores the Indian Navy’s commitment to indigenization and aligns with the Government of India’s 'Atmanirbhar Bharat' vision.

💡 Other Important Facts:

  • (i) INS Arnala measures 77.6 metres in length and 10.5 metres in breadth, and is equipped with a Diesel Engine–Waterjet propulsion system, making it the largest Indian Naval warship with this configuration. The vessel is capable of full-scale sub-surface surveillance, as well as search and attack operations in coastal waters, enhancing the Indian Navy's anti-submarine warfare capabilities.
  • (ii) The warship has been indigenously designed and constructed in accordance with the Classification Rules of the Indian Register of Shipping (IRS). Its development was carried out through a Public-Private Partnership (PPP) between Garden Reach Shipbuilders and Engineers Limited (GRSE) and the L&T Shipyard—a unit of Larsen & Toubro, located at Kattupalli, Tamil Nadu.
  • (iii) INS Arnala will undertake underwater surveillance, search and rescue missions, and support Low Intensity Maritime Operations (LIMO). These capabilities position it as a vital asset for enhancing coastal security and expanding the Indian Navy’s presence in shallow waters.

📚 Test Your Knowledge:

Which is India’s first indigenously developed Anti-Submarine Warfare Shallow Water Craft (ASW SWC) delivered to the Indian Navy?

Correct Answer: INS Arnala

🚀 Quick Recap:

About Indian Navy (IN)

  • Chief of Naval Staff (CONS) : Admiral Dinesh Kumar (DK) Tripathi
  • Headquarters: New Delhi